Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans
<p>Our previous study shows that the angle of linear polarization (AOLP) of solar radiation that is scattered from clouds at near-backscatter angles can be used to detect super-thin cirrus clouds over oceans. Such clouds are too thin to be sensed using any current passive satellite instruments...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-12-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/19/15583/2019/acp-19-15583-2019.pdf |
| _version_ | 1811220464172793856 |
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| author | W. Sun W. Sun Y. Hu R. R. Baize G. Videen G. Videen S. S. Kim Y.-J. Choi K. Kang C. K. Sim M. Jeong A. Omar S. A. Stamnes D. G. MacDonnell E. Zubko |
| author_facet | W. Sun W. Sun Y. Hu R. R. Baize G. Videen G. Videen S. S. Kim Y.-J. Choi K. Kang C. K. Sim M. Jeong A. Omar S. A. Stamnes D. G. MacDonnell E. Zubko |
| author_sort | W. Sun |
| collection | DOAJ |
| description | <p>Our previous study shows that the angle of linear polarization
(AOLP) of solar radiation that is scattered from clouds at near-backscatter
angles can be used to detect super-thin cirrus clouds over oceans. Such
clouds are too thin to be sensed using any current passive satellite
instruments that only measure light's total intensity, because of the
uncertainty in surface reflection. In this report, we show that with a
method similar to the super-thin cloud detection algorithm, dust aerosols
may also be detected and differentiated from clouds. We also show that the
degree of polarization of reflected light can be used for retrieving the
optical depth of dust aerosols in the neighborhood of the backscatter angle, regardless of the reflecting surface conditions. This is a simple and robust algorithm, which could be used to survey dust aerosols over midlatitude and
tropical oceans.</p> |
| first_indexed | 2024-04-12T07:42:21Z |
| format | Article |
| id | doaj.art-89b90f821ac34092b3ff72d5ca4a08a6 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-12T07:42:21Z |
| publishDate | 2019-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-89b90f821ac34092b3ff72d5ca4a08a62022-12-22T03:41:47ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242019-12-0119155831558610.5194/acp-19-15583-2019Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceansW. Sun0W. Sun1Y. Hu2R. R. Baize3G. Videen4G. Videen5S. S. Kim6Y.-J. Choi7K. Kang8C. K. Sim9M. Jeong10A. Omar11S. A. Stamnes12D. G. MacDonnell13E. Zubko14Science Systems and Applications Inc, Hampton, Virginia 23666, USAKyung Hee University, Yongin-shi, Kyungki-do 17104, KoreaNASA Langley Research Center, Hampton, Virginia 23681, USANASA Langley Research Center, Hampton, Virginia 23681, USAKyung Hee University, Yongin-shi, Kyungki-do 17104, KoreaUS Army Research Lab, Adelphi, Maryland 20783, USAKyung Hee University, Yongin-shi, Kyungki-do 17104, KoreaKorea Astronomy and Space Science Institute, Yuseong-gu, Daejeon 34055, KoreaKorea Advanced Institute of Science and Technology, Daejeon 34141, KoreaKyung Hee University, Yongin-shi, Kyungki-do 17104, KoreaKorea Astronomy and Space Science Institute, Yuseong-gu, Daejeon 34055, KoreaNASA Langley Research Center, Hampton, Virginia 23681, USANASA Langley Research Center, Hampton, Virginia 23681, USANASA Langley Research Center, Hampton, Virginia 23681, USAKyung Hee University, Yongin-shi, Kyungki-do 17104, Korea<p>Our previous study shows that the angle of linear polarization (AOLP) of solar radiation that is scattered from clouds at near-backscatter angles can be used to detect super-thin cirrus clouds over oceans. Such clouds are too thin to be sensed using any current passive satellite instruments that only measure light's total intensity, because of the uncertainty in surface reflection. In this report, we show that with a method similar to the super-thin cloud detection algorithm, dust aerosols may also be detected and differentiated from clouds. We also show that the degree of polarization of reflected light can be used for retrieving the optical depth of dust aerosols in the neighborhood of the backscatter angle, regardless of the reflecting surface conditions. This is a simple and robust algorithm, which could be used to survey dust aerosols over midlatitude and tropical oceans.</p>https://www.atmos-chem-phys.net/19/15583/2019/acp-19-15583-2019.pdf |
| spellingShingle | W. Sun W. Sun Y. Hu R. R. Baize G. Videen G. Videen S. S. Kim Y.-J. Choi K. Kang C. K. Sim M. Jeong A. Omar S. A. Stamnes D. G. MacDonnell E. Zubko Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans Atmospheric Chemistry and Physics |
| title | Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans |
| title_full | Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans |
| title_fullStr | Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans |
| title_full_unstemmed | Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans |
| title_short | Technical note: A simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans |
| title_sort | technical note a simple method for retrieval of dust aerosol optical depth with polarized reflectance over oceans |
| url | https://www.atmos-chem-phys.net/19/15583/2019/acp-19-15583-2019.pdf |
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